解放初期东莞市曾发生过较大面积的疟疾暴发流行。1987年东莞市被列为国家经济开放区 ,随着经济发展 ,流动人口迁移 ,疟疾的流行特点发生变化 ,为了解开放前后疟疾发病的流行情况 ,进一步做好疟防工作 ,现将开放前后 2 3年疟疾流行病学分析如下。材料来源与方法1　发病数以当地 In the early days of the liberation, there was a large area of ​​malaria outbreak in Dongguan City. In 1987, Dongguan City was listed as a national economic open area. With the economic development, the floating population migrated and the epidemic characteristics of malaria changed. To understand the prevalence of malaria before and after the opening up and further improve malaria prevention work, Three years of malaria epidemiological analysis is as follows. Source of material and method 1 The incidence of local